Improved machine for tempering files, saws



J.- SMALL..

` y Machine for Tempring Saws, Files, &c. N0. 49,451. l Patented Aug, 115, 1865.

lUNtTnD STATES PATENT OFFICE. i.

JOHN SMALL, OF ST. LOUIS, MISSOURI.

IMPRovED MACHINE FOR TEMPERINGFILES, sAws, sw.

Specification forming part of Letters Patent No. 49,451. dated August 15, 1865. i i

chine. Fig. 2 is a Vlongitudinal section takenVV in the vertical plane indicated by the red line x w in Fig. 4. Fig. 3 is a longitudinal section taken in the vertical plane indicated by the red line y y, Fig. 4. Fig. 4 is a vertical transverse section through Fig. l, taken at the point indicated by red line z z.

Similar letters of reference indicate corresponding parts in the several ligures.

Thisinvention relates to machinery for clamping plates ot' steel and preventing the plates from warping during the process of tempering them.

The invention consists in the use of perforated and. ribbed j aws, between whichthe plates which are to be tempered are contined, one of said jaws being adjustable and susceptible of being moved up to or from the other, as will be hereinafter described.

The invention also consists in the employment of adjustable hooks, in conjunctionwith clamping-jaws, for the purpose ot' drawing the plates which are to be tempered down between the ,said jaws and holding them during the process ot' tempering, as will be hereinafter described.

The invention finally consists in providing for adjustin gone ofthe clamping-jaws to plates which are tapering, as well as to plates which are fiat on both sides, as will be hereinafter described.

To enable others skilled in the art to understand my invention, I will describe its construction and operation.

In the accompanying drawings, A represents a rectangular bath-tub, which is adapted for containing oil or such ingredient us may one side ofthe saine, aie two jaws, O O, which are set upright, and which extend nearlyfrom one end of the tub to the other. 'lhejaw Oise` secured rigidly to one ot' the vertical sides ot' the tub, so that oil can circulate all around ii,`

and the jaw O is secured to vertical strips n. a., through the ends ot' which screw-rods b b b b are tapped, as shown iu Figs. l1 und 3. The jaw C" is about the same size as the jaw O, and it is supported and adjusted by the four horizontal transverse screw-rods I) b, which are passi-d through one sideof the tub A and furnished on their outer ends with pinion spurwhcels c c, all of which are ot' a uniform dialneter.

The rods b b lare supported near theirinner ends upon a longitudinal bar, A', and these rods are so applied to the tub that they can have no end-play. Oonsequentlywhen these rods areali turned bythe large spur-wheel d, which engages with the piuions co,il1ejaw`0' will be moved either toward the jaw O or fro-n it, according to the direction in whichthe wheel d is rotated. d f

The jaws O C are constructed with ribs cion their opposite faces, which leave wide channels between them. Theseribs should be made very narrow `und extended from `tpp to bottom ot' each jaw. `They project from the face of the jaws suflieiently far to admit of their being planed level and still leave wide channels between them for the free cirvculation of oil between the jaws and the article confined between them. A

In order to admit of a more freecireulation of the oil between the jaws G G', I `pert'orate these plates between the ribs c e, as shown in Figs. 2 and 3, so that cold oil will flow directly upon the hot steel plates. d

The ribs ot' one plate or jaw may be arranged so as to be opposite the spaces between the ribs of the opposite plate, or .these ribs may be arranged nearly opposite each other. They may be formed with rounded edges, or they may be made iat or acute, according to circumstances;

I prefer to make these ribs very n`arrow,s0`

down between the clamping-surfaces. In the ribbed face ofthe stationary jaw C, I form vertical dovetail grooves, and insert into these grooves the rods g g g, which have hooks on their upper ends, as shown in Figs. 1, 2, and 4. These hooked rods pass down through the bottom ofthe tub A, and are secured at their lower ends to a horizontal rod, J, the ends of which pass through vertical slots which are made through thc legs B B, as shown in Figs., 2 and 4.

To the outer ends ot' the rod J cords h. 7L are attached, which cords pass tightly around the pulleys 7c l at each end of the tub. The pulleys l l are keyed ou acrankrod, K, which extends across the top ot' the tub, as shown in Figs. 1, 2, and et. By turning the hand-crank ofthe rod K the hoolied'rods ggg can be moved up or down, and when desired their hooks can be brought between the two clamping-jaws C C. These hooked rods g g g are for the purpose of forcibly drawing down the plates to be tempered and holding these plates between the clamping-jaws during the tcmperingor cooling operation. The hooks carrythe plates beneath the surface of the hath, when the jaws C G are very close to each other.

For tempering saws and blades or plates which are flat on both sides and ot' a uniform thickness the two jaws should he parallel to each other and their ribs planed very true. In such cases the large spur-wheel d is used for turning the screw-rods simultaneously, and thus moving the jaw C squarely up to the jaw C.

Where it is desired to temper knife-blades or plates which are chamf'ered the large wheel d is removed and the jaw C moved up to the jaw C in an inclined plane, accordingv to the bevel of the blade to be confined and tempered.

For tempering bellied tiles l employjaws the ribs of which are dressed to conform to thc shape of such tiles, so that every part ot' the tile will be firmly held by said ribs.

It is importantto brace the movablejaw C to prevent it from yielding during the process of tempering large plates, and for this purpose the screw-rods b b b" b are made to answer the purpose by arranging them at proper distances apart.

The openings which are made through the bath-tub for the passage of the several rods should be provided with stuffing-boxes or their equivalents to prevent the tub from leaking.

I am aware that patents have been granted to Charles W. Filmore, January l0, 1854, to Q. l). Grossman, July 2S, 1857, and to Wm. Gleiuson,August2l, 1860, on machines for tempering different articles; but the construction ot' these machines differs from mine to a very great extent.

What I claim as new and my invention, and desire to secure by Letters Patent, is-

1. rlhe arrangement ot' the Vertical perforated jaws C C', which are constructed with narrow ribs or elevations upon their surfaces, in combination with the bath-tub A and the adjusting devices of one of thejaws, substantially in the manner and for the purposes herein described.

2. The construction, arrangement, and operation of the adjustable hooks g g, in combination with the jaws C C, substantially in the manner and for the purposes described.

3. The arrangement of the adjusting and bracing rods b b with the jaws C C', hooks g g, bathtub A, and inner support, A', substantially in the mannerand for the purposes described.

JOHN SMALL.

Witnesses:

Go'rTLIEB S'rosBERG, ALBERT Srosnnae. 

